I was reading an old cruising thread elsewhere...sorry I don't have a link to it. But it raised the point that lots of people dream about the versatility of quite large catamarans being conveniently beached, and safely left to dry out in beautiful locations which are inaccessible to almost all other yachts...
...and the suggestion was clearly made that some catamaran builders are keen to promote this image of large cats being easily dried-out in idyllic spots, whereas doing so may actually endanger the vessel's structure, not only because of obvious risks like occasional rocks on a sandy beach holing the hull, but because big cats require carefully-judged placing when drying out, as their structural stiffness may be compromised when all the vessel's weight is only supported on three corners.
I'd be interested to read owners' accounts of drying out in catamarans over about 35ft - particularly if these stories demonstrate or disprove the claimed danger.